srclist overlap message for exposure 3 of trigger 844615
uvot_overlap.pl vrs. 2010-12-20b fem started at 180626d10h08m32s792942usUT
The observation of trigger 844615 started 2018-06-26T08:36:04.2
Examining file ./844615_g887_uvot_sky_srclist.fits
The exposure ID is 551694964
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (243.5639,14.7702) with a roll angle of 320.5
It is square with sides of 12.05 arc min. for an area of 145.15 sq arc min
The BAT error circle is centered at (243.5670,14.7640) with a radius of 3.000 arc min
This is 0.412 arc min from the center of the uvot region
The area of the BAT error circle is 28.27 sq. arc min
The UVOT/BAT overlap is 28.27 sq. arc min or 1.00 of the BAT error circle
The XRT error circle is centered at (243.5760,14.7569) with a radius of 0.030 arc min
This is 1.063 arc min from the center of the uvot region
The area of the XRT error circle is 0.003 sq. arc min
The UVOT/XRT overlap is 0.003 sq. arc min or 1.00 of the XRT error circle
srclist afterglow message for exposure 3 of trigger 844615
find_uvot_ag.pl vrs. 2017-02-17 fem started at 180626d10h09m01s072041usUT
Observation start time is 2018-06-26T08:36:04.2
Examining file ./844615_g887_uvot_catalog_srclist.fits
The exposure ID is 551694964
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 148 detected source(s) for 844615_g887
Aspect correction adds 0.00022 degrees (0.054 sec of time = 0.78 arc sec) to RA
Aspect correction adds 0.00105 degrees ( 3.77 arcsec) to Dec
Total aspect correction is 3.85 arcsec
Star catalogs centered at 243.5628 , 14.7723 with radius 8.87 arc min.
n_usno: 1094 n_gsc: 952
*** WARNING -- bright star catalog has 6 entries brighter than 12 mag
The brightest has mag 9.96
RA DEC Mag Color
bright star 0: 243.52998 (16:14:07.19) 14.79844 (+14:47:54.4) 11.19 USNO-V
bright star 1: 243.58107 (16:14:19.46) 14.64708 (+14:38:49.5) 11.24 USNO-V
bright star 2: 243.69347 (16:14:46.43) 14.82068 (+14:49:14.4) 10.42 USNO-V
bright star 3: 243.56950 (16:14:16.68) 14.62907 (+14:37:44.6) 9.96 GSC-V
bright star 4: 243.56079 (16:14:14.59) 14.81475 (+14:48:53.1) 11.63 GSC-V
bright star 5: 243.66266 (16:14:39.04) 14.68093 (+14:40:51.4) 11.57 GSC-V
Mean distance difference (CAT_DELTA) for 110 matched entries is 0.808" for 844615_g887
Mean and std. dev of mag. difference (MAG_DELTA) are 0.935 and 0.907 for 844615_g887
Found 43 entries without IDs and 0 entries that are acceptable afterglow candidates for 844615_g887.
Acceptable entries have no ID, XRT distances < 5", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
31 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=243.5670 (16:14:16.08) DEC=14.7640 (+14:45:50.4)
XRT distances are from RA=243.5760 (16:14:18.25) DEC=14.7569 (+14:45:24.9)
*** WARNING 29 per cent of entries have no IDs.
Found NO acceptable entries.
Unidentified entry closest to XRT position is no. 59:
ra=243.58523 dec= 14.70803 +/- 1.1" mag=19.34+/-0.35 dist=178.9 REFID=113
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
There are no candidates inside BAT error circle, but outside XRT error circle.
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 19.22, XRT distances < 5",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
srclist paragraph message for exposure 3 of trigger 844615
------ Start for Possible Stand-alone Circular ----
In response to GRB180626 (Swift/BAT trigger 844615) at 08:21:16 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 866 seconds after the BAT trigger. No credible afterglow candidate has
been found in the initial data products. The 2.7'x2.7' sub-image covers 100% of
the XRT error circle. The typical 3-sigma upper limit has been about 19.6 mag.
The 8'x8' region for the list of sources generated on-board covers 100% of the
XRT error circle. The list of sources is typically complete to about 18 mag. No
correction has been made for the expected extinction corresponding to E(B-V) of
0.04.
------- notes for trigger 844615 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 180626d10h09m05s632428usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=844615
-expid=551694964 -meonly -msg_srclist
Results from standard processing of UVOT TDRSS data for this trigger should be
available at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/844615/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
XRT position found for srclist. XRT position found for Genie image. BAT
position found.
UVOT exposure began at MET 551694964.19326 or about 2018:177:08:35:59 UT
Found 1090 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 9% of the srclist region. Found 148 sources in
srclist catalog. Found 43 srclist source(s) without IDs. There are 0 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
19.22 mag.
Found 13 source(s) in Genie image catalog. Found 0 Genie image source(s)
without IDs. There are 0 good candidate(s) in the Genie image catalog. Good
candidates must be brighter than 20.89 mag. Found 117 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
12% of the Genie image region.
Genie image analysis:
Found 39820.4 counts in the large background region of 6111.0 pixels or a rate
of 6.516 counts/pixel in a radius of 45.0 arcsec. Based on this background, the
typical 5-sigma UL at a random point in the Genie image is 20.33 mag. for a
4-arcsec aperture.
Found 1364.2 counts in the XRT position region of 198.0 pixels or a rate of
6.890 counts/pixel in a radius of 8.0 arcsec. The net count rate (using large
background region) at the XRT position is 0.493 +/- 0.250 (1-sigma) cps or
20.55 mag and a range from 20.10 to 21.31 mag. The 3-sigma UL at the XRT
position is 1.243 cps or 19.54 mag. The closest srclist source has ra= 243.5757
dec= 14.7613 mag=18.70 sep=15.84". The closest Genie source has ra= 243.5757
dec= 14.7614 mag=18.14 sep=15.97".
All AG candidates sorted by magnitude for the current finding chart.
(U/V/White SRCLIST mags < 17.5/17.5/18.5 are reliable. Mag > 18.5/18.5/19.5 are
not. Others are uncertain.)
(U/V/White Genie image mags < 18.0/18.0/19.0 are reliable. Mag > 19.0/19.0/20.0
are not. Others are uncertain.)
(Magnitudes followed by * have been corrected for exposure.)
---MET--- -dt- filter ---RA-- ---DEC--- -MAG/Limit Dist(") Source Asp.Corr?
551694964 865 WHITE srclist found no candidates.
551694964 865 WHITE image found no candidates.
List afterglow candidates for other finding charts.
551694221 122 WHITE srclist found no candidates.
551694221 122 WHITE 243.57551 14.75707 20.71/20.9 1.9 image Yes
551694433 334 U srclist found no candidates.
551694433 334 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: 14.75692
GRB_ERROR: 5
GRB_RA: 243.57604
IMAGE_START_TIME: 08:35:59
MAGNITUDE: 19.5
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT